Equipower second-stage impeller variable rotational speed matching method for two stages of impellers of contra-rotating fan
The invention relates to an equipower second-stage impeller variable rotational speed matching method for two stages of impellers of a contra-rotating fan. According to the method, firstly, the input power N1 of a first-stage impeller motor and the input power N2 of a second-stage impeller motor are...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention relates to an equipower second-stage impeller variable rotational speed matching method for two stages of impellers of a contra-rotating fan. According to the method, firstly, the input power N1 of a first-stage impeller motor and the input power N2 of a second-stage impeller motor are measured in real time; secondly, the power difference of the two stages of impellers is calculated according to the formula that delta N=(N1-N2)/N1; thirdly, if the power difference delta N of the two stages of impellers is within the error limit range, namely -epsilon |
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